129251043 has 6 divisors (see below), whose sum is σ = 186695964. Its totient is φ = 86167356.

The previous prime is 129251039. The next prime is 129251063. The reversal of 129251043 is 340152921.

It is not a de Polignac number, because 129251043 - 2² = 129251039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129250998 and 129251016.

It is not an unprimeable number, because it can be changed into a prime (129251063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7180605 + ... + 7180622.

It is an arithmetic number, because the mean of its divisors is an integer number (31115994).

Almost surely, 2^129251043 is an apocalyptic number.

129251043 is a deficient number, since it is larger than the sum of its proper divisors (57444921).

129251043 is a wasteful number, since it uses less digits than its factorization.

129251043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14361233 (or 14361230 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 129251043 is about 11368.8628718971. The cubic root of 129251043 is about 505.6049907103.

The spelling of 129251043 in words is "one hundred twenty-nine million, two hundred fifty-one thousand, forty-three".